Answer:
10 µm
Explanation:
Magnification = observed size ÷ actual size
So, Actual size = observed size ÷ magnification
In order to convert millimetre to micrometre, multiply by 1000
Actual size = 
∴ The actual size of the nucleus is 10 µm.
The Gallbladder stores bile that is produced in the liver
D. Connie chooses water quality as her current event, since the local news recently criticized water quality in their area. For her visual aid, she makes a data table of contaminants and their abundance in the local water supply.